Roman Imperial Coinage (RIC)

Mattingly H. & E. Sydenham, et al. The Roman Imperial Coinage. (London, 1926 - 2007).

RIC I: Sutherland, C. The Roman Imperial Coinage, Vol. I, From 39 BC to AD 69. (London, 1984).
RIC II.1: Carradice, I. & T. Buttrey. The Roman Imperial Coinage, Vol. II, Part 1: From AD 69 to 96. (London, 2007).
RIC II: Mattingly H. & E. Sydenham. The Roman Imperial Coinage, Vol. II: Vespasian to Hadrian. (London, 1926).
RIC III: Mattingly, H. & E. Sydenham. The Roman Imperial Coinage, Vol. III, Antoninus Pius to Commodus. (London, 1930).
RIC IV: Mattingly, H., E. Sydenham & C. Sutherland. The Roman Imperial Coinage, Vol. IV, From Pertinax to Uranius Antoninus. (London, 1986).
RIC V.1: Mattingly, H., E. Sydenham & P. Webb. The Roman Imperial Coinage, Vol. V, Part I, Valerian to Florian. (London, 1927).
RIC V.2: Mattingly, H., E. Sydenham & P. Webb. The Roman Imperial Coinage, Vol. V, Part II, Probus to Amandus. (London, 1933).
MER-RIC: Monnaies de l'Empire Romain - Roman Imperial Coinage, AD 268 - 276.
RIC VI: Sutherland, R. & C. Carson. The Roman Imperial Coinage, Vol. VI, From Diocletian's reform to the death of Maximinus. (London, 1967).
RIC VII: Bruun, P. The Roman Imperial Coinage, Vol. VII, Constantine and Licinius A.D. 313 - 337. (London, 1966).
RIC VIII: Carson, R., H. Sutherland & J. Kent. The Roman Imperial Coinage, Vol. VIII, The Family of Constantine I, A.D. 337 - 364. (London, 1981).
RIC IX: Pearce, J. The Roman Imperial Coinage, Vol. IX, Valentinian I - Theodosius I. (London 1933).
RIC X: Kent, J. The Roman Imperial Coinage, Vol. X, The Divided Empire and the Fall of the Western Parts, AD 395 - 491. (London, 1994).

Also see RIC Rarity